The answer to the question
Solution: X=6
Detailed explanation:
In this problem we're asked to find "x" or the unknown.
The first step is to subtract 11x from both sides.

Next, subtract 79 from both sides.

To finish this off, divide both sides by -11.

Voila! There's our answer!
<h2><em>Cheers!! ^-^</em></h2>
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The correct answer is Choice A.
This is an example of an exponential equation, so we need the formula

.
The a value is the starting value of 100. The b value must be a decimal lower than 1 because it is decreases.
If you substitute in 8 for x, you will see that the output is about 50 (half of 100).